12.6: I think they mean "SKIP_BODY" and "SKIP_PAGE" instead of "BODY" and "PAGE". The object is probably that you should understand which method can use which constant. JSP specification sais:
"public static final int SKIP_BODY
Skip body evaluation. Valid return value for doStartTag and doAfterBody.
public static final int SKIP_PAGE
Skip the rest of the page. Valid return value for doEndTag."
10.2: When beans are used in JSP they are set to a certain scope level. The objective is to understand what scope level corresponds to which object in a servlet contex.
For example page 4 of this resource http://java.sun.com/products/jsp/pdf/card12.pdf
request = HttpServletRequest
session = HttpSession
application = ServletContext